Silber or mpi

sledhead455

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Nov 28, 2007
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As the title says, silber or mpi for an 850? Why? Hope to get some feedback, not much real world info I can find. Thanks
 

DUKHTR3

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Nov 30, 2007
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Silber. We have 2 on our group and one is mine. They both run great. Mpi is running old tech on the fuel controller. However I have never road a mpi but I did have the doebeck fuel controller and it was junk.

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Nov 27, 2007
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medicine hat
Ran one for a weekend and first day ran very well but no big pulls, Cory called the that night and I was very happy, he said don’t hold back, so I let her buck a bit.. 7 pound spring and 40 are so seconds at 6800’ don’t work well.. removed kit the following week, no calls
returned from Sibler.. cause was lean burn down pto side.. the stock oem fuel system cannot substain 7 lbs at that elevation and we latter found that their air box has substantial more airflow to pto side over mag.. redline kits binna bullet ever since and a lot more power
 

madmax

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Nov 26, 2007
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I was one of the first with an MPI on my 17’ 850 and loved it. Ran perfect from day one. Set up a number of them, they were great kits a few years ago, but MPI is not building them anymore, so customer support is very difficult. The silber doo 850 is by far their best running kit, got 4 riding buddies with them. The silber is about a perfect as you can get if installed and set up properly.
 

christopher

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Nov 1, 2008
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I was one of the first with an MPI on my 17’ 850 and loved it. Ran perfect from day one. Set up a number of them, they were great kits a few years ago, but MPI is not building them anymore, so customer support is very difficult. The silber doo 850 is by far their best running kit, got 4 riding buddies with them. The silber is about a perfect as you can get if installed and set up properly.


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BirdmanID

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Idaho falls
I was one of the first with an MPI on my 17’ 850 and loved it. Ran perfect from day one. Set up a number of them, they were great kits a few years ago, but MPI is not building them anymore, so customer support is very difficult. The silber doo 850 is by far their best running kit, got 4 riding buddies with them. The silber is about a perfect as you can get if installed and set up properly.

Beyond installing correctly, what considerations are you referring to for it to be set up properly?
 
Nov 27, 2007
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medicine hat
I gave my Sibler kit to my nephew and told him to run it a 5 lbs only at our 7k feet we ride here, so far kit is running strong and he loves it..

Now what is wrong with there kits, they rely on the stock fuel injectors and stock ecm to add fuel under boost.. but stock injectors are maxed out at 5 lbs boost, and anything after that is working in the red zone.. long pulls will take motor down...kit should never be sent out with 7 lb spring installed

the other thing they should of done is bench flow there airbox design better, the pto side piston is getting 20 percent more air than mag side under full boost, and why it’s only side that goes down from lean..

Now if you can keep it under 5lbs at lower elevations you will have a wonderful kit that spools and pulls well, nice cheap 190hp kit..
 
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